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CA Standards

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The Joule is the SI system unit for measuring heat:

The calorie is the heat required to raise the temperature of 1 gram of water by 1 Celsius degree

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The amount of heat required to raise the temperature of one gram of substance by one degree Celsius.

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cp = Specific Heat

Q = Heat lost or gained

T = Temperature change

OR

m = Mass

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The amount of heat required to raise the temperature of one gram of substance by one degree Celsius.

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Molar Heat of Fusion

The energy that must be absorbed in order to convert one mole of solid to liquid at its melting point.

The energy that must be removed in order to convert one mole of liquid to solid at its freezing point.

Molar Heat of Solidification

Slide 8

Latent Heat of Phase Change #2

Molar Heat of Vaporization

The energy that must be absorbed in order to convert one mole of liquid to gas at its boiling point.

The energy that must be removed in order to convert one mole of gas to liquid at its condensation point.

Molar Heat of Condensation

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Problem: The molar heat of fusion of water is

6.009 kJ/mol. How much energy is needed to convert 60 grams of ice at 0C to liquid water at 0C?

Mass

of ice

Molar

Mass of

water

Heat

of

fusion

Slide 10

The Heat of Solution is the amount of heat energy absorbed (endothermic) or released (exothermic) when a specific amount of solute dissolves in a solvent.

- Thermochemical Calculations
- Units for Measuring Heat
- Specific Heat
- Calculations Involving Specific Heat
- Specific Heat
- Latent Heat of Phase Change
- Latent Heat – Sample Problem
- Heat of Solution

- Upcoming Classes
- Motion
- Soil and Plant Nutrition
- Radiation Safety and Operations
- Practical Applications of Solar Energy
- Simulation at NASA for the Space Radiation Effort
- Resource Acquisition and Transport in Vascular Plants

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